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From: Daniel Lezcano <daniel.lezcano@linaro.org>
To: Anup Patel <anup.patel@wdc.com>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	Rob Herring <robh+dt@kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>
Cc: devicetree@vger.kernel.org,
	Damien Le Moal <damien.lemoal@wdc.com>,
	Emil Renner Berhing <kernel@esmil.dk>,
	Anup Patel <anup@brainfault.org>,
	linux-kernel@vger.kernel.org, Atish Patra <atish.patra@wdc.com>,
	Alistair Francis <Alistair.Francis@wdc.com>,
	linux-riscv@lists.infradead.org
Subject: Re: [PATCH v5 2/4] clocksource/drivers: Add CLINT timer driver
Date: Thu, 23 Jul 2020 16:34:07 +0200
Message-ID: <d6cf82bd-70ad-19e9-36ef-35c9db92fa56@linaro.org> (raw)
In-Reply-To: <20200723142409.47057-3-anup.patel@wdc.com>

On 23/07/2020 16:24, Anup Patel wrote:
> We add a separate CLINT timer driver for Linux RISC-V M-mode (i.e.
> RISC-V NoMMU kernel).
> 
> The CLINT MMIO device provides three things:
> 1. 64bit free running counter register
> 2. 64bit per-CPU time compare registers
> 3. 32bit per-CPU inter-processor interrupt registers
> 
> Unlike other timer devices, CLINT provides IPI registers along with
> timer registers. To use CLINT IPI registers, the CLINT timer driver
> provides IPI related callbacks to arch/riscv.
> 
> Signed-off-by: Anup Patel <anup.patel@wdc.com>
> Tested-by: Emil Renner Berhing <kernel@esmil.dk>
> ---

Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>



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Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-23 14:24 [PATCH v5 0/4] Dedicated " Anup Patel
2020-07-23 14:24 ` [PATCH v5 1/4] RISC-V: Add mechanism to provide custom IPI operations Anup Patel
2020-07-23 14:24 ` [PATCH v5 2/4] clocksource/drivers: Add CLINT timer driver Anup Patel
2020-07-23 14:34   ` Daniel Lezcano [this message]
2020-07-23 14:24 ` [PATCH v5 3/4] RISC-V: Remove CLINT related code from timer and arch Anup Patel
2020-07-23 14:35   ` Daniel Lezcano
2020-07-23 14:24 ` [PATCH v5 4/4] dt-bindings: timer: Add CLINT bindings Anup Patel
2020-07-23 17:08   ` Rob Herring
2020-07-24  2:55     ` Anup Patel

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